They have tons of assets and not much money. That's part of why the problem is so intractable.
People put limits on what they should be able to own, but if we extend that idea globally (i.e. don't discriminate based on simply where you were born), then most of us in the first world would also be liable to give up our TVs, cars, latops, houses etc. And then suddenly seizing assets is bad...
The problem is not simple or straightforward. It's mostly people who want more complaining about those who also want more.